title: 6,12-Bis[(tri-cyclo-hexyl-sil-yl)ethyn-yl]indeno-[1,2-b]fluorene.
abstract: The title compound, C60H76Si2, a formally anti-aromatic system containing 20-π electrons, contains a rare p-xylylene motif. This is displayed by the alternating short and long bonds. The outer rings possess nearly homogenous bond lengths. In the crystal, the molecules forms layers perpendicular to the c axis and within these layers there are two one-dimensional stacks with one stack that has a sp (2) carbon contact of 3.283 (6) Å, less than the sum of the van der Waals radii. The center of the mol-ecule sits on an inversion center.
authors.affiliation: Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253, USA.
authors.forename: Bradley D
authors.initials: BD
authors.lastname: Rose
authors.forename: Lev N
authors.initials: LN
authors.lastname: Zakharov
authors.forename: Michael M
authors.initials: MM
authors.lastname: Haley